Employee Benefit Plans (MEC) Funded Status (Details) (MidAmerican Energy Company [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Defined Benefit Plans, Supplemental Employee Retirement Plans [Abstract]
Rabbi trusts insurance policies and investments	$ 172	$ 168
United States Pension Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Fair Value of Plan Assets	643	555
Employer contributions	7	65
Participant contributions	0	0
Actual return on plan assets	142	74
Benefits paid	(70)	(51)
Defined Benefit Plan, Fair Value of Plan Assets	722	643	555
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation, beginning of year	846	799
Service cost	18	18	18
Interest cost	33	37	39
Participant contributions	0	0
Actuarial loss (gain)	(59)	43
Benefits paid	(70)	(51)
Benefit obligation, end of year	768	846	799
Accumulated benefit obligation, end of year	751	821
Defined Benefit Plan, Funded Status of Plan [Abstract]
Defined Benefit Plan, Fair Value of Plan Assets	722	643	555
Less - Benefit obligation, end of year	768	846	799
Funded status	(46)	(203)
Other assets	66	0
Other current liabilities	(8)	(8)
Other liabilities	(104)	(195)
Amounts recognized	(46)	(203)
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Fair Value of Plan Assets	226	213
Employer contributions	1	1
Participant contributions	1	2
Actual return on plan assets	40	25
Benefits paid	(12)	(15)
Defined Benefit Plan, Fair Value of Plan Assets	256	226	213
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation, beginning of year	213	198
Service cost	5	4	4
Interest cost	8	8	10
Participant contributions	1	2
Actuarial loss (gain)	20	16
Benefits paid	(12)	(15)
Benefit obligation, end of year	235	213	198
Defined Benefit Plan, Funded Status of Plan [Abstract]
Defined Benefit Plan, Fair Value of Plan Assets	256	226	213
Less - Benefit obligation, end of year	235	213	198
Funded status	21	13
Other assets	21	13
Other current liabilities	0	0
Other liabilities	0	0
Amounts recognized	21	13
Supplemental Employee Retirement Plans, Defined Benefit [Member] | MEHC [Member]
Defined Benefit Plans, Supplemental Employee Retirement Plans [Abstract]
Rabbi trusts insurance policies and investments	149	136
Supplemental Employee Retirement Plans, Defined Benefit [Member] | MidAmerican Energy Company [Member]
Defined Benefit Plans, Supplemental Employee Retirement Plans [Abstract]
Rabbi trusts insurance policies and investments	$ 98	$ 94